Keyboard sequence monitoring upgraded not to react on modifier keys, canceling multi-key sequences when non-first key modifier pressed

ZRCola/zrcolakeyhndlr.cpp

@@ -54,13 +54,14 @@ bool wxZRColaKeyHandler::ProcessEvent(wxEvent& event)
 {
     if (event.GetEventType() == wxEVT_KEY_DOWN) {
         // The character event occured.
+        wxKeyEvent &e = (wxKeyEvent&)event;
+        if (e.GetUnicodeKey() || !e.HasAnyModifiers()) {
             ZRCola::keyseq_db::indexKey::size_type start, end;
             bool found;
             wxFrame *pFrame = wxDynamicCast(wxTheApp->GetTopWindow(), wxFrame);
 
             {
                 // Parse key event and save it at the end of the key sequence.
-            wxKeyEvent &e = (wxKeyEvent&)event;
                 ZRCola::keyseq_db::keyseq::key_t key;
                 key.key = e.GetKeyCode(); //wxToupper(e.m_uniChar);
                 key.modifiers =
@@ -112,6 +113,7 @@ bool wxZRColaKeyHandler::ProcessEvent(wxEvent& event)
                     pFrame->SetStatusText(wxEmptyString);
             }
         }
+    }
 
     return wxEvtHandler::ProcessEvent(event);
 }